Harrow



July 21, 1925. 1,546,438

F. DRAVLAND ET AL HARROW Filed April 14, 1924 //V EA/TO/PS,

E D/PA VLA/V0,

W C/PZ/SE.

Patented .luly 21, 15525.

PATENT ()FFIQE,

FREDRICK DRAVLAND AND WILLIAM (JR-USE, OF DULUTH, IVEINNESO'IA.

EAR-ROW.

Application filed April 14, 1924. Serial No 706,248.

To (ZN/7071077171 may concern Be it known that we, Fromm K Dam LAND and lViLLLtM Cnusn, each a citizen of the limited States, residing at Duluth, in the county of Louis and State of lvlinnesota, have invented certain new and useful lmprovemcnts in Barrows, of which the follow'ii is a specification, reference being had therein to the accompanying"drawing.

This invention relates to agricultural implements and has special reference to a hariow or drag in which a plurality of sections of drags employed and vertically ad justable independently for cleaning purposes; the present invention havi particular reference to mcansfor raising and lowering the harrow sections.

The principal object is to provide simple means for raising and lowering the rear end of the harrow sections, and one that will be convenient of access to the operator of the barrow.

@ther objects and advantages will appear in the further description of the invention.

Referring now to the accompanying drawing in which like reference characters indicate like oarts:

Figure 1 is a top plan View ofa multisection harrow equipped with our lmproved 30 section lifting device;

Figure 2 is a front elevation of Figure 1;

Figure 3 is an enlarged side elevation of one (if the adjustable sheave blocks through which the section lifting ropes pass;

Figure d is an enlarged side elevation of the mounting for the rope supporting shaft; while Figure 5 is a reduced side elevation of the completely assembled device.

The harrow to which We have shown our device attached is of common construction, having a floating tow beam .1 which may be provided with shoes or skids 2 for holding it slightly above the ground and to which tow beam are attached the harrow sections 3 as at 1, the same being any well known form of link and clevis connection.

As a means for supporting the section lifting device as well as the operator, we provide a metal fabricated chassis 5 surmounting the harrow centrally thereof, the forward ends of the chassis being flexibly attached in any desired manner to the up per face of the tow beam, as at 66. On either side of the chassis and just rearward ly of the harrow sections are vertical journals 7 m which are mounted the shanks of the castor wheels 8, there being two of. these for the support of the body portion of the chassis so that the same is free to turn with the harrow in any direction desired. Above and extending rearwardly of the wheels 8 is a rectangularly shaped light frame struc ture 9 and in the center and extending rearwardly thereof is the drivers seat 10. In front of this seat is an upstanding frame like instrument board 1.1 which carries therein the section operating rods 12 of which there is one for each section of 'harrow.

Just forwardly of the wheel mountings of the chassis is a tubular transverse shaft 13, in either end of which is telescopically mounted a smaller shaft 14;. The shafts 14: extend laterally to a point centrally of the outermost sections 8 of the harrow and just rearwardly thereof, and in the outboard ends of the extensions 14 are carried sheaves 15 over each of which the line 16, attached as at 17 centrally to the free end of the outermost sections 3, extend. Each of these lines 16 is carried inwardly towards the center of the chassis 5, where it passes around a sheave 18 mounted in the adjustable block 19 fixed upon the tubular shaft 18 and is attached to the end of its respective adjustin rod 12. A she-ave carrying block 20, snni lar to the block 19, is mounted adjacent the ends of the shaft 13 one upon either end thereof, each carrying a sheave 21 over which the line 22 is payed, said line being attached as at 23 to the intermediate barrow sections and thence over the sheave 21 to a similar sheave 24 in the block 25 on the shaft 13, eventually being attached to its respective operating rod 12.

The centermost harrow section 3 is attached in like manner by the use of the line 26 passing upwardly over a sheave 27 in the block 28 and to the operating rod 12 so that in this manner each harrow section 3 may be lifted independently by pulling the respective operating rods 12, and the extensions 14 of the sheave supporting shaft may be adjusted by virtue of their telescopic connection with the shaft 13, a collar and set screw being provided for such adjustment, as at 29, to accommodate any width of harrow desired, and an additional or less number of sheave carrying blocks to accommodate the number of sections in the of blocks 80' formii'ig' saddles in which the shaft 13 rests with the U-bolt 31 surroundmg same and passing downwardly through the frame of the chassis where it may be drawn up tightly and thus held in position. The sheave carrying blocks, an enlarged view of which is illustrated in Figure 8, may be adpisted longitudinally or 'rotatab-ly the sections cooperatively engageablewlth upon the shaft to accommodate the draft of the line therethrough.

The embodiment of' 'our invention which we have shown is applied to a horse drawn harrow, but in the event of same beingroperated by a tractor it may becomedesirahle to extend the harrow lifting linesand rods to the rear of the tractor'in \VlllCll' event it is quite obvious "that the only change necessary would be turn shaft 13 cnd for end and extend the lines'and operating'rods -12 to the rear of the tractor.

VJhile we have described. the operating mechanism only'of the centermo-st and two right hand sections 3 of the harro-w, it is apparent that the description applies to the oppositesidethereof, as the mechanism is identical.

As a means for maintaining the section operating lines taught at all times, there'is interposed upon the rods 12 an expansive spiral spring 33 between the operating loop on the ends thereof and the instrument board 11.

To the forward end of-each section-3 is bolted one or more forwardly, projecting rods 3d, they being bent up attheir-forward free ends over-the tow board 1 and normally slightly above same, so that when the rear end of a section is lifted as above described by the operating line the arcuate end of these shoes will engage the 11131361 surface of the tow board and thus afford means for preventing the nose of the1section digging intothe ground,- by slightly lifting same. 1

lVhile we have shown a particular type of harrow, it is evident that the lifting mechanism is equallyapplicable to varied types of harrows. I

From the foregoing it is'evide ntthatwe have produced an exceedingly simple and practical attachment for harrows, not only in respect to a lifting device for the cleaning and freeing of the indi\' idual' sections from obstructions but also a convenient and practical form of support for the driver or operator of the-barrow, and one that provides against the weight of -the operator being applied thereto when riding.

Taving thus described our invention, what we'claim and"desire'to'secure by Letters Patent, is:

1. The combination with a multi-section harrow having a tow board common to all of the sections and to which the sections are attached, and means above the rearmost free ends ofthe sections for raisingand lowering' same,of means at the forward endsof the tow' board for raising the forward ends of thesections simultaneously with theraising of the rearmo-st ends'of thesections; l

2. A harrow ofthe characterdescribed comprising in combination a plurality of harrow sections, a towboard common to all of the sections to which theyare attached having ground engagingfshoes fixed to same, a carriage chassis above the rearmost-free ends of theharrow sections, said chassis having a forwardly and downwardlyinclined rigid portionpivotally attached to the tow board, means carried by the chassis for selectively raising the free ends of the harrow sections, means at the forward ends of the sections normally'out of engagement with the tow board for raisingthe forward ends of same simultaneously with the. raising of the rearmost ends of the sections.

3 A harrow of the character described comprising in combination a plurality of harrow sections, a 130WbOZllCl'COITlIIlO-llllO all of the sections to which they are attached havingground engaging shoes fixed tosa-me,

a carriage chassis above the rearmostfree ends of the harrow sections, said chass s having a forwardly. and downwardlyinclined rigid portion pivotally attachedto the tow board, means carried by the chassis for selectively raising the free ends of the harrow sections, shoe like means carided upon. the forward end of f each. section extending forwardly and above the tow board for engagement with the upper face offthe tow board when the rearmost ends of the sections are lifted for simultaneously lifting the forward ends of the sections. In testimony whereof we hereunto afiix our signatures in the presence of two wit nesses.

FBEDRICK DRAVLAND. H VVILLI-AM GRUS-E; Witnesses:

S. G. BRONSON, 1

S. Gino. STEVENS.

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